/*
 *
 * Paros and its related class files.
 * 
 * Paros is an HTTP/HTTPS proxy for assessing web application security.
 * Copyright (C) 2003-2004 Chinotec Technologies Company
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Clarified Artistic License
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * Clarified Artistic License for more details.
 * 
 * You should have received a copy of the Clarified Artistic License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.parosproxy.paros.core.scanner.plugin;

import java.util.regex.Pattern;

import org.parosproxy.paros.Constant;
import org.parosproxy.paros.core.scanner.AbstractAppParamPlugin;
import org.parosproxy.paros.core.scanner.Alert;
import org.parosproxy.paros.core.scanner.Category;
import org.parosproxy.paros.network.HttpMessage;

/**
 * 
 * To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Generation - Code and Comments
 */
public class TestCrossSiteScriptInScriptSection extends AbstractAppParamPlugin {

	private static final String XSS4 = "alert('{" + Constant.getEyeCatcher() + "}');";

	private static final Pattern patternXSS4 = Pattern.compile(
			"<SCRIPT>.*?alert\\('\\{" + Constant.getEyeCatcher() + "\\}'\\);.*?</SCRIPT>", Pattern.DOTALL);

	public int getId() {
		return 40002;
	}

	public String getName() {
		return "Cross site scripting in SCRIPT section";
	}

	public String[] getDependency() {
		return null;
	}

	public String getDescription() {
		String msg = "Cross-site scripting or HTML injection is possible within javascript <SCRIPT> and </SCRIPT> section.\r\n"
				+ "Malicious javacript can be injected into the browser even if the server filtered certain specail characters such as double quotes and <>.\r\n"
				+ "It will appear to be genuine content from the original site. "
				+ "These scripts can be used to execute arbitrary code or steal customer sensitive information such as user password or cookies.\r\n"
				+ "Very often this is in the form of a hyperlink with the injected script embeded in the query strings.  However, XSS is possible via FORM POST data, cookies, "
				+ "user data sent from another user or shared data retrieved from database.\r\n"
				+ "Currently this check does not verify XSS from cookie or database.  They should be checked manually if the application retrieve database records from another user's input.";

		return msg;
	}

	public int getCategory() {
		return Category.HTML_INJECTION;
	}

	public String getSolution() {
		String msg = "You should check manually if this is exactly cross-site script in this case."
				+ "Do not embed dynamic content within <SCRIPT></SCRIPT> sections.  "
				+ "Do not trust client side input even if there is client side validation.  Sanitize potentially danger characters in the server side.  Very often filtering the <, >, \" characters prevented injected script to be executed in most cases.  "
				+ "However, sometimes other danger meta-characters such as ' , (, ), /, &, ; etc are also needed.\r\n"
				+ "In addition (or if these characters are needed), HTML encode meta-characters in the response.  For example, encode < as &lt;\r\n";
		return msg;
	}

	public String getReference() {
		String msg = "<ul><li>The OWASP guide at http://www.owasp.org/documentation/guide</li>"
				+ "<li>http://www.technicalinfo.net/papers/CSS.html</li>"
				+ "<li>http://www.cgisecurity.org/articles/xss-faq.shtml</li>"
				+ "<li>http://www.cert.org/tech_tips/malicious_code_FAQ.html</li>"
				+ "<li>http://sandsprite.com/Sleuth/papers/RealWorld_XSS_1.html</li></ul>";

		return msg;
	}

	public void init() {

	}

	public void scan(HttpMessage msg, String param, String value) {

		setParameter(msg, param, XSS4);

		try {
			sendAndReceive(msg);

		} catch (Exception e) {
			e.printStackTrace();
		}

		
		StringBuffer sb = new StringBuffer();
		
		if (matchBodyPattern(msg, patternXSS4, sb)) {
			bingo(Alert.RISK_MEDIUM, Alert.SUSPICIOUS, null, param + "=" + XSS4, null, msg);
			return;
		}

	}

	public boolean isVisible() {
		return Constant.isSP();
	}
}
